TVR Speed Twelve engine: Difference between revisions
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| manufacturer = [[TVR]] | | manufacturer = [[TVR]] | ||
| configuration = [[Naturally aspirated]] V12 | | configuration = [[Naturally aspirated]] V12 | ||
| displacement = {{ | | displacement = {{cvt|7731|cc|L cc cuin|1|order=out}} | ||
| block = Steel | | block = Steel | ||
| valvetrain = [[DOHC]] [[Multi-valve#Four valves|4 valves]] per [[Cylinder (engine)|cylinder]] | | valvetrain = [[DOHC]] [[Multi-valve#Four valves|4 valves]] per [[Cylinder (engine)|cylinder]] | ||
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| oilsystem = [[Dry sump]] | | oilsystem = [[Dry sump]] | ||
| coolingsystem = [[Water cooling (engines)|Water-cooled]] | | coolingsystem = [[Water cooling (engines)|Water-cooled]] | ||
| power = {{ | | power = {{cvt|880|bhp|PS kW|0}} at 7,250 rpm<ref name="Twelve"/> | ||
| torque = {{ | | torque = {{cvt|650|lbft|0}} at 5,750 rpm<ref name="Twelve"/> | ||
}} | }} | ||
The '''TVR Speed Twelve engine''' is the name of a [[V12 engine]] manufactured by [[TVR]] for use in the [[TVR Speed 12]] race car, and later the TVR Cerbera Speed Twelve road car.<ref name=Dodds>{{cite book|last1=Dodds|first1=Ralph|title=TVR: Cars of the Peter Wheeler Era|date=31 July 2015|publisher=The Crowood Press Ltd|isbn=978-1847979971}}</ref> | The '''TVR Speed Twelve engine''' is the name of a [[V12 engine]] manufactured by [[TVR]] for use in the [[TVR Speed 12]] race car, and later the TVR Cerbera Speed Twelve road car.<ref name=Dodds>{{cite book|last1=Dodds|first1=Ralph|title=TVR: Cars of the Peter Wheeler Era|date=31 July 2015|publisher=The Crowood Press Ltd|isbn=978-1847979971}}</ref> | ||
The engine was developed by essentially joining two [[TVR Speed Six engine|Speed Six]] engine blocks to a common crankshaft. | The engine was developed by essentially joining two [[TVR Speed Six engine|Speed Six]] engine blocks to a common crankshaft. However it featured a revised cylinder head design with bucket valve actuation in place of the Speed Six's finger follower system. The completed engine displaced 7.7 litres and was originally developed for racing applications in TVR's Speed Twelve. Later on, a version was developed for the prototype of a road car to be called the Cerbera Speed Twelve. | ||
Unusually for an automobile, the Speed Twelve's engine block was not constructed of [[cast iron]] or [[aluminum]] [[alloy]], but rather of welded [[steel]] construction.<ref>{{Cite web |title=Birth of an Icon: TVR Speed 12 |url=https://www.evo.co.uk/features/10977/birth-of-an-icon-tvr-speed-12 |access-date=2022-09-20 |website=evo |language=en}}</ref> | Unusually for an automobile, the Speed Twelve's engine block was not constructed of [[cast iron]] or [[aluminum]] [[alloy]], but rather of welded [[steel]] construction.<ref>{{Cite web |title=Birth of an Icon: TVR Speed 12 |url=https://www.evo.co.uk/features/10977/birth-of-an-icon-tvr-speed-12 |access-date=2022-09-20 |website=evo |language=en}}</ref> | ||
The racing version of the engine produced approximately {{ | The racing version of the engine produced approximately {{cvt|675|bhp|kW|0}} with its power limited by the intake restrictors required by racing regulations. For the road-version of the engine, the restrictors were not needed so the engine was developed without them. According to reports from TVR engineers, the de-restricted engine snapped the central shaft of their {{cvt|1000|bhp|kW|0}}-rated [[dynamometer]] during the bench-test. The engine's output was later estimated at {{cvt|960|bhp|kW|0}}, though the official figure given by TVR was {{cvt|800|bhp|kW|0}}.<ref name="Twelve">{{Cite web |last=D |first=Nick |date=2016-04-23 |title=2000 TVR Cerbera Speed 12 {{!}} Review |url=https://www.supercars.net/blog/2000-tvr-cerbera-speed-12-2/ |access-date=2022-09-20 |website=Supercars.net |language=en-US}}</ref> When the prototype vehicle was road-tested by then-owner [[Peter Wheeler (TVR)|Peter Wheeler]], he reportedly concluded that the vehicle was too powerful to be practical and the project was scrapped. | ||
==References== | ==References== | ||
Latest revision as of 03:07, 21 June 2025
Template:Use dmy dates Template:Use British English Template:Refimprove Template:Main other Script error: No such module "Infobox".Template:Template otherScript error: No such module "Check for unknown parameters". The TVR Speed Twelve engine is the name of a V12 engine manufactured by TVR for use in the TVR Speed 12 race car, and later the TVR Cerbera Speed Twelve road car.[1]
The engine was developed by essentially joining two Speed Six engine blocks to a common crankshaft. However it featured a revised cylinder head design with bucket valve actuation in place of the Speed Six's finger follower system. The completed engine displaced 7.7 litres and was originally developed for racing applications in TVR's Speed Twelve. Later on, a version was developed for the prototype of a road car to be called the Cerbera Speed Twelve.
Unusually for an automobile, the Speed Twelve's engine block was not constructed of cast iron or aluminum alloy, but rather of welded steel construction.[2]
The racing version of the engine produced approximately Template:Cvt with its power limited by the intake restrictors required by racing regulations. For the road-version of the engine, the restrictors were not needed so the engine was developed without them. According to reports from TVR engineers, the de-restricted engine snapped the central shaft of their Template:Cvt-rated dynamometer during the bench-test. The engine's output was later estimated at Template:Cvt, though the official figure given by TVR was Template:Cvt.[3] When the prototype vehicle was road-tested by then-owner Peter Wheeler, he reportedly concluded that the vehicle was too powerful to be practical and the project was scrapped.